Astonishing. Unthinkable for me. Reading absorbs me fully. My family usually jokes every thief could empty the room I'm reading in undisturbed. Doing anything else while reading leads to postponing the reading in my case.

Same for me! Most of the books that I read are about history or philosophy, and therefore require a lot of attention. I can't possibly imagine doing other things while reading as I would forget a whole lot of details and I would have to reread pages too often to make it worthwhile.